Insert OpenBook tags and a book’s ISBN into a post, and OpenBook will replace it with a book cover, title, author and publisher. It links to more book details at its data source, Open Library (http://openlibrary.org).
A plugin that beautifies and enhances the default WordPress Admin interface.
SuperLinks is a WordPress 2.5+ plugin that replaces the standard Links sidebar widget. SuperLinks gives the site owner greater control over how links in the sidebar are displayed. For example, one can choose to display all links categories or only a single links category. Additionally, a site owner may have any number of SuperLinks widgets in the sidebar.
MultiSiteManager (MSM) is a WordPress plugin which will perform two of the most important tasks of an administrator: backups and upgrades. MSM can manage any number of WordPress installations from one “master” WP installation. (To manage a WordPress website with MSM, you need FTP access to the site.)
Allows people to define a keyword as always linking to a given URL. This allows you to link within your site like Wikipedia, and rank accordingly.